Income Taxes (Schedule Of Components Of Income Tax Expense (Benefit) For Continuing Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Current:
Federal	$ 58,834	$ 18,048	$ 74,993
State	12,000	(16,614)	12,345
Foreign	26,032	1,991	6,711
Current income tax expense (benefit)	96,866	3,425	94,049
Deferred:
Federal	2,493	1,703	6,625
State	(11,368)	(1,516)	(1,070)
Foreign	(9,467)	(13,142)	300
Deferred taxes	(18,342)	(12,955)	5,855
Total income taxes (benefit) for continuing operations	$ 78,524	$ (9,530)	$ 99,904